RFR: 8303210: [linux, Windows] Enable UseSystemMemoryBarrier by default if possible [v2]

[David Holmes]

On Tue, 28 Feb 2023 05:29:51 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> There were also concerns when many single thread handshakes are used.

Ah! The startup issues may be related to JDK-8300926. I'll need to apply that change and rerun them.

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PR: https://git.openjdk.org/jdk/pull/12753